I know they look good, they sound good but how exactly does it help your driving? Recent posting from kenken seems to suggested a substantial increase in consumption Initially (before the computer adapt to the hardware change).
so who should get it? it only helps on high revs? (5k-7k?)

I've read great reviews on the Simota intake. Some even go as far as to say that it out performs the Gruppe M at a fraction of the cost. Know of any shops which stocks this in HK? I couldn't seem to find a distributor on the Simota website.

I have the Simota for the 335i..I bought it from some guys in Taiwan who shipped it to me in NY..its a good intake IMO..much better than stock ofcourse..and I like that its a closed lid for cooler temps

The Gruppe M is esentially the same thing and uses a K&N airfilter..sells for $2K - USD ..no thx..I paid a fraction for the Simota